Triangular
Min · Likely · MaxStraight-sided three-point estimate — the quick, defensible range.
Engine / distributions
Distribution palette
The duration and impact distributions available for quantifying uncertainty in the model.
Engine / uncertainty
Ten distributions, one model.
Choose the shape that matches the uncertainty, keep the assumption visible and run it through the same auditable engine.
Beta PERT
Low · Likely · HighSmoother than triangular — weights the most-likely value with softer tails.
Split-Triangular
Low · Likely · HighIndependent left and right slopes for a deliberately skewed range.
Uniform
Min · MaxEvery value between the bounds is equally likely — a pure range.
Trigen
Low % · Likely · High %Triangular anchored to percentiles instead of the hard extremes.
Normal
Mean · Std devSymmetric bell around a mean, spread by one standard deviation.
LogNormal
Mean · Std devRight-skewed — a small chance of a large overrun, floored at zero.
Discrete
Value · ProbabilityNamed outcomes, each carrying its own probability weight.
Cumulative
Percentile pointsDefine the S-curve directly from your own percentile data.
Single Point
ValueA deterministic value — no spread, used to pin an input.
What this page covers
- Beta-PERT and Triangular
- Trigen, Uniform and Normal
- Three-point ranges per activity or group
From proof to demo.
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